无线传感器网络中的异步协作通信方案

Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (10): 2331-2335.

无线传感器网络中的异步协作通信方案

郭丽丽, 岳殿武, 闫秋娜

大连海事大学信息科学技术学院, 辽宁, 大连, 116026

收稿日期:2008-05-28 修回日期:2008-09-10 出版日期:2009-10-20 发布日期:2010-01-03
作者简介:郭丽丽(1981- ),女,博士研究生,主要研究方向为无线通信技术、空时编码技术、无线传感器网络.E-mail:lengyue_lily@126.com
基金资助:
国家自然科学基金(60672030)资助课题

Asynchronous cooperative transmission scheme for wireless sensor networks

GUO Li-li, YUE Dian-wu, YAN Qiu-na

School of Information Science and Technology, Dalian Maritime Univ., Dalian 116026, China

Received:2008-05-28 Revised:2008-09-10 Online:2009-10-20 Published:2010-01-03

摘要/Abstract

摘要： 为了改善多跳传感器网络的性能,提出了一种基于三种空间分集技术的异步协作传输模式.该模式是考虑非同步网络传输,多个传感器通过共享天线,形成虚拟多天线发送/多天线接收(MIMO)的协作通信,并利用空时编码、发射天线选择和信号空间分集三种空间分集技术,有效抵制传输信道的衰落,提高了系统的分集增益.通过蒙特卡罗仿真,结果表明,对比传统的单发单收传输模式和异步空时协作传输模式,该传输模式获得了更高的分集增益,提高了系统的性能,从而节省了网络的能量损耗.

Abstract: In order to improve the performance of multi-hop wireless sensor networks,a cooperative transmission scheme without perfect synchronization based on three diversity technologies is proposed,in which multiple sensors generate a virtual multiple-antenna transmitter/multiple-antenna receiver(MIMO) cooperative transmission mechanism through sharing antennas under an asynchronous transmission condition.Furthermore,three diversity technologies,space-time block code(STBC),transmit antenna selection(TAS) and signal space diversity,are adopted so as to mitigate channel fading effectively and improve system diversity gains.It is shown by Monte Carlo simulation that compared with the traditional transmission scheme or asynchronous STBC cooperative transmission scheme,the proposed scheme can provide further performance improvement by increasing the diversity order and save more energy in wireless sensor networks.

中图分类号:

TN911.22

郭丽丽, 岳殿武, 闫秋娜. 无线传感器网络中的异步协作通信方案[J]. Journal of Systems Engineering and Electronics, 2009, 31(10): 2331-2335.

GUO Li-li, YUE Dian-wu, YAN Qiu-na. Asynchronous cooperative transmission scheme for wireless sensor networks[J]. Journal of Systems Engineering and Electronics, 2009, 31(10): 2331-2335.

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